Hi there,
I am having trouble with my sound, which was not working at all first and now I got it to work by adding options snd-intel-dspcfg dsp_driver=1 to the alsa.conf file (which I had to create, there was none in /etc/modprobe.d). the mic is still not working, perhaps there is an obvious reason for that. I will post some alsa output which includes the system info. The soundcard is recognized and I get a big list of drivers when I grep for the snd in th modules. I should probably add I have added a few more lines to the alsa.conf but played around with them and checked with and without (see below). Maybe someone can help 
options snd-hda-intel index=0 model=laptop-dmic
options snd-intel-dspcfg dsp_driver=1
options snd-intel-dmicfg dmic_driver=1
options snd-hda-intel enable_msi=1
options snd_hda_intel enable=1
options snd_hda_intel.dmic_detect=1
!!################################
!!ALSA Information Script v 0.4.65
!!################################
!!Script ran on: Tue Mar 2 22:58:42 UTC 2021
!!Linux Distribution
!!------------------
Fedora release 33 (Thirty Three)
!!DMI Information
!!---------------
Manufacturer: HP
Product Name: HP EliteBook 840 G6
Product Version:
Firmware Version: R70 Ver. 01.02.00
System SKU: 7YM32ES#ABD
Board Vendor: HP
Board Name: 8549
!!ACPI Device Status Information
!!---------------
/sys/bus/acpi/devices/ACPI000C:00/status 15
/sys/bus/acpi/devices/HPIC000C:00/status 15
/sys/bus/acpi/devices/HPQ6001:00/status 15
/sys/bus/acpi/devices/IFX0785:00/status 15
/sys/bus/acpi/devices/INT3400:00/status 15
/sys/bus/acpi/devices/INT3403:00/status 15
/sys/bus/acpi/devices/INT3403:01/status 15
/sys/bus/acpi/devices/INT340E:00/status 15
/sys/bus/acpi/devices/INT34BB:00/status 15
/sys/bus/acpi/devices/INT3F0D:00/status 15
/sys/bus/acpi/devices/LNXPOWER:00/status 15
/sys/bus/acpi/devices/LNXPOWER:02/status 1
/sys/bus/acpi/devices/LNXPOWER:04/status 1
/sys/bus/acpi/devices/LNXPOWER:05/status 1
/sys/bus/acpi/devices/LNXPOWER:06/status 1
/sys/bus/acpi/devices/LNXPOWER:07/status 1
/sys/bus/acpi/devices/PNP0103:00/status 15
/sys/bus/acpi/devices/PNP0B00:00/status 15
/sys/bus/acpi/devices/PNP0C02:00/status 3
/sys/bus/acpi/devices/PNP0C02:01/status 3
/sys/bus/acpi/devices/PNP0C02:05/status 3
/sys/bus/acpi/devices/PNP0C09:00/status 15
/sys/bus/acpi/devices/PNP0C0A:00/status 31
/sys/bus/acpi/devices/PNP0C0C:00/status 11
/sys/bus/acpi/devices/PRP00001:00/status 11
/sys/bus/acpi/devices/SYNA3091:00/status 15
/sys/bus/acpi/devices/USBC000:00/status 15
/sys/bus/acpi/devices/device:04/status 15
/sys/bus/acpi/devices/device:27/status 15
/sys/bus/acpi/devices/device:28/status 15
/sys/bus/acpi/devices/device:45/status 15
!!Kernel Information
!!------------------
Kernel release: 5.10.18-200.fc33.x86_64
Operating System: GNU/Linux
Architecture: x86_64
Processor: x86_64
SMP Enabled: Yes
!!ALSA Version
!!------------
Driver version: k5.10.18-200.fc33.x86_64
Library version:
Utilities version: 1.2.4
!!Loaded ALSA modules
!!-------------------
snd_hda_intel
!!Sound Servers on this system
!!----------------------------
Pulseaudio:
Installed - Yes (/usr/bin/pulseaudio)
Running - Yes
Jack:
Installed - Yes (/usr/bin/jackd)
Running - No
!!Soundcards recognised by ALSA
!!-----------------------------
0 [PCH ]: HDA-Intel - HDA Intel PCH
HDA Intel PCH at 0x4000108000 irq 145
!!PCI Soundcards installed in the system
!!--------------------------------------
00:1f.3 Multimedia audio controller [0401]: Intel Corporation Cannon Point-LP High Definition Audio Controller [8086:9dc8] (rev 11)
Subsystem: Hewlett-Packard Company Device [103c:8549]
!!Modprobe options (Sound related)
!!--------------------------------
snd_hda_intel: index=0 model=laptop-dmic
snd_intel_dspcfg: dsp_driver=1
snd_intel_dmicfg: dmic_driver=1
snd_hda_intel: enable_msi=1
!!Loaded sound module options
!!---------------------------
!!Module: snd_hda_intel
align_buffer_size : -1
bdl_pos_adj : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
beep_mode : N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N
dmic_detect : Y
enable : Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y
enable_msi : -1
id : (null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
index : 0,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
jackpoll_ms : 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
model : laptop-dmic,(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
patch : (null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
pm_blacklist : Y
position_fix : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
power_save : 1
power_save_controller : Y
probe_mask : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
probe_only : 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
single_cmd : -1
snoop : -1